Aviation safety issues and actions

Ineffective corrosion protection of Main Rotor Gearbox

Issue number: AO-2011-088-SI-01
Who it affects: Operators of Robinson R44 helicopters
Issue owner: Robinson Helicopter Co
Operation affected: Aviation: Other
Background: Investigation Report AO-2011-088
Date: 27 August 2012

Safety issue description

Paint application to the main rotor gearbox, gear carrier did not effectively protect the part from corrosion resulting from gearbox water ingress.

Current issue status: Safety action pending
Status justification:

The ATSB is awaiting confirmation that the safety action has been introduced into the manufacturing process.

Last update 24 February 2014